<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8"/>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover"/>
    <title>400:无法理解的网络请求</title>
<style>
      a:link{color:blue;}
      a:visited{color:blue;}
      a:active{color:red;}
</style>
  </head>
  <body style="font-size:5vw;background-color:#white;height:100%;margin:0px">
    <div style="text-align:center;margin-top:1em">404:File Not Found</div>
    <hr color="#ff0000"/>
    但你可以去访问<a href="/index.html">主页</a>
  </body>
</html>
